Allow fetching from multiple sources

src/index.html

@@ -10,9 +10,10 @@
     <meta name="format-detection" content="telephone=no" />
     <meta name="msapplication-tap-highlight" content="no" />
     <link rel="manifest" href="./manifest.json" />
-    <link rel="stylesheet" href="./_/code/shared.css" />
+    <link rel="stylesheet" href="" />
+    <script>window.config = { UI: 'https://frm.so', SERVER: 'https://frm.so' }</script>
     <script type="module">
-      await import('./util.js')
+      await import('./mobileutil.js')
 
       function appendScript(src, isModule = false) {
         return new Promise((resolve, reject) => {
@@ -26,9 +27,24 @@
         })
       }
 
+      function appendStylesheet(href, { replaceExisting = false } = {}) {
+            return new Promise((resolve, reject) => {
+                    if (replaceExisting) {
+                    document.querySelector('link[rel="stylesheet"]')?.remove();
+                }
+                const link = document.createElement('link');
+                link.rel = 'stylesheet';
+                link.href = href;
+                link.onload = resolve;
+                link.onerror = reject;
+                document.head.appendChild(link);
+            });
+        }
+
       try {
-        await appendScript(window.util.HOST + '/_/code/quill.js')
-        await appendScript(window.util.HOST + '/83947261/index.js', true)
+        await appendStylesheet(`${window.config.UI}/_/code/shared.css`, { replaceExisting: true });
+        await appendScript(window.config.UI + '/_/code/quill.js')
+        await appendScript(window.config.UI + '/83947261/index.js', true)
       } catch (e) {
         document.body.innerHTML = `
           <style>